Markup Extensions in WPF/Silverlight
Has anyone ever created a custom markup extension in WPF or Silverlight? When would you ever want or need to do this? Any tips or sources on how to do it? ...
markup-extensions
MarkupExtension as computed property in Template
Having such MarkupExtension public class Extension1 : MarkupExtension { private static int _counter = 0; public override object ProvideValue(IServiceProvider serviceProvider) { return string.Format("Item {0}", _counter++); } } and this XAML <ListBox> <ListBoxItem Content="{my:Extension1}"></ListBoxItem> <...
How do I resolve the value of a databinding?
I've made a markup extension for translating strings based on a key. Example <TextBlock Text="{Translate myKey}" /> Now I want to be able to use nested bindings for providing my keys. Example: <TextBlock Text="{Translate {Binding KeyFromDataContext}}" /> When I do this I get a System.Windows.Data.Binding object. By calling ProvideV...
How can I escape a single quote in a XAML markup extension property literal?
I have a value converter that formats numbers (I can't use SP1 yet unfortunately). It works fine until it gets a percentage. Here's an example: <TextBlock Text="{Binding Path=PercentageComplete, Converter={StaticResource NumberFormatter}, ConverterParameter='0.00 %'}" /> Unfortunat...
jQuery: A widget or plug-in to create text balloons
I need to create some balloons that will contain text messages, similar to what you would see on a BBS or a blog comments area. I am not looking for a tool-tips widget - There will be several per page and they will always be displayed. My requirements: Drop shadows, if possible, using images instead of the box-shadow style for compat...
x:Static markup extension
I have a Window.Resource object and the next statement <CollectionViewSource Source="{Binding Source={x:Static Application.Current}, Path=someProperty}" x:Key="someView" /> But what if I need to point to a public property in the Window's code-behind, not the App's? I've tried to use 'this' instead of 'Applic...
Override default markup extensions
I have written custom markup extesions, but what if I need to override an markup extension already defined? For example, I need to serialize StaticResources references and not the values when using XamlWriter.Save(object obj) method, so I guess what I need is to write a custom markupextension inheriting from ‘StaticResourceExtension’ tha...
Get the value for a WPF binding
Ok, I didn't want a bunch of ICommands in my MVVM ViewModels so I decided to create a MarkupExtension for WPF that you feed it a string(the name of the method), and it gives you back an ICommand that executes the method. here's a snippet: public class MethodCall : MarkupExtension { public MethodCall(string methodName) { Method...
Accessing "current class" from WPF custom MarkupExtension
I'm attempting to write a custom MarkupExtension to make my life easier by giving me a better way to specify bindings in XAML. However I would like to know if there is any way I can access the object that represents the file the MarkupExtension is used in. In other words, suppose I have a UserControl that defines a particular rendition ...
'System.Windows.Data.MultiBinding' is not a valid value for property 'Text'.
I'm trying to write a custom MarkupExtension that allows me to use my own mechanisms for defining a binding, however when I attempt to return a MultiBinding from my MarkupExtension I get the above exception. I have: <TextBlock Text="{my:CustomMarkup ...}" /> CustomMarkup returns a MultiBinding, but apparently Text doesn't like being ...
The uncatchable exception
Followup: http://stackoverflow.com/questions/3057822/the-uncatchable-exception-pt-2 I'm writing a custom binding engine; my converter is being called before DataContext is set on the target element. This in and of itself isn't a big deal because it will get updated when DataContext eventually receives a value. What is causing problems i...
Question about this xaml markup extension
Hi, I'm trying to understand what does the markup extension for the x:Key attribute below do and what kind of markup extension is it? <Window x:Class="App1.Window1" xmlns:dxg="http://schemas.microsoft.com/winfx/2006/xaml/presentation"> <DataTemplate x:Key="{dxg:Example ResourceKey=Example}"> <dxg:TextEdit Text="123/> </DataTemp...
WPF - Custom Mark-up Extensions return RoutedEvents
Hello! I'm trying to create a generalized event for my Close buttons, where they have to close the window but before that set focus to the owner window. I don't want to have an event for every file for that, because that'd be pretty unpractical since I have 30+ windows in my application. (So if I wanted to change that behavior, i'd have ...
x:Type and arrays--how?
Long story short, I need to do this: ExpressionType="{x:Type sys:Byte[]}" In other words, I need to do this: foo.ExpressionType=typeof(byte[]); Wat do? Update: Its a bug in the 2010 design surface. It works fine at runtime. ...
How to reference a specific implementation of a generic type in the DataType attribute of a DataTemplate?
This question is strongly connected to this answer to "How to reference a generic type in the DataType attribute of a HierarchicalDataTemplate?" I followed the basic idea of that answer and created this data structure: <!-- for DictItemVM<string, Remote.Address> which is a viewmodel for a KeyValuePair<...> --> <x:Array Type="{x:Type sy...
WPF - Getting a property value from a binding path
Hi, if I have an object say called MyObject, which has a property called MyChild, which itself has a property called Name. How can I get the value of that Name property if all I have is a binding path (i.e. "MyChild.Name"), and a reference to MyObject? MyObject -MyChild -Name ...
How does IsSynchronizedWithCurrentItem really work with ContentControl and Data Templates?
I have a markup extension that is working with Binding. Things work well except when the markup extension is used in a DataTemplate which is then used by a ContentControl that is bound to the same property as a ListView with IsSynchronizedWithCurrentItem=true. How can I get the CurrentIt...
WPF - Unit testing a custom markup extension
Hi, how would you recommend unit testing a custom markup extension in WPF? Presumably, I need to create an instance of my markup extension and call the ProvideValue method. However, this requires an IServiceProvider, which contains an IProvideValueTarget service. How would I generate this programmatically? ...
Visual Studio 2010 and custom markup extension
Hello. I have created a custom MarkupExtension for localization like below: [System.Windows.Markup.MarkupExtensionReturnType(typeof(string))] [System.Windows.Markup.ContentProperty("LocalizedValue")] public class LocItem : System.Windows.Markup.MarkupExtension { public LocItem() :base() { } public string Localiz...